Sometimes the most useful hacks are also the simplest ones. A case in point is the LED and resistor assembly that [Skippy] recently posted on his blog. The idea is to solder up some pre-made ...

and in resistor color-code on an enormous symbolic resistor lit by WS2812 RGB LEDs behind. Inside The Great Resistor, the LEDs and baffle plates make the magic work Precision aside, the project ...

To calculate the resistance of the series resistor required, we need to look at the current and voltage values recommended by the LED manufacturer. Suppose a manufacturer recommends a maximum ...